P. C. Chaurasia*, Jitendra Singh**, S. N. Dikshit***, S. S. Harne*** & D.A.Sarnaik****
Department of Horticulture, Indira Gandhi Krishi Vishwavidyalaya, Raipur-492 012 (CG)
Corresspondance address: pcsagri@yahoo.co.in
*Research scholar, **Senior Scientist, ***Associate Professor, ****HOD
Abstract: In a line (6 x 4) study degree of heterosis varied from cross to cross for all the traits. The highest relative heterosis for tuber yield was observed in the progeny of IGSP-16 x Indira Madhur (39.45%). None of the progenies exhibited significant positive heterobeltiosis for tuber yield per plant whereas, fifteen progenies showed significant positive heterobeltiosis for number of tuber per plant. Heterosis was observed for number of tubers per plant and number of leaves per plant. While, low heterosis value were observed for tuber yield per plant, average weight of tubers, harvest index and number of veins per plant; moderate heterosis was observed for days to maturity , vein hight, fresh weight of top per plant and dry matter content. Overall, frequency of heterotic crosses was higher among the crosses involving parents with average gca effects.
Keywords: Heterosis, Ipomoea batatas, Tuber
REFERENCES
Buso, J.A., Biteux, L.S. and Peloquin, S.J. (2003). Tuber yield and quantity of 4x-2x potato progenies derived from the wild diploid species S. berthyitii and S. tarijense Potato Genetics 122: 229-32.
Fonseca, S. and F.L. patterson (1968). Hybrid vigour in a seven parental diallel crosses in commom winter wheat (T. aestivum L.) crop Sci. 8: 85-90.
Luthra, S.K. Sharma, P.C. and Gopal, J. (2001). Interrelationship between genetic parameters for tuber yild in potato. J. Indian potato Assoc. 28:15-17.
Mishra, A.C., N.P. Singh and Ram, H.S. (2003). Genetic divergence among advanced hybrids and varieties of potato. J. Indian Potato Assoc. 29:175-76.
Panse, V.G. and Sukhatme, P.V. (1978). Statiscal methods for Agricultural workers. ICAR,New Delhi,India.
Truong, V.D., Birman, C.J. and Marlette, J.A. (1986). Simple sugars. Oligosaccharides and starch: concentration in raw and cooked sweeet potato (Ipomoea batatas (L.) Lam.) J. Agric Food chem.,USA, 34 (3):421-425.
Walter, W.M. and Catignani, G.L. (1981). Biological quality and composition of sweet potato protein fraction. J. Agric. Food Chem., 29 (2): 797-799.